The choice of leaf-killing technique was found to affect significantly the distribution of label among early labeled photosynthetic products in two C(4) plants, Portulaca oleracea and Zea mays. The major effect of these procedures was on the amount of amino acids present, particularly alanine, and the ratio of malate to aspartate. Killing Portulaca leaves in alcohol generally results in more al...

I n 1914 Mr. B. T. AVERY, who was then my gardener assistant a t the CONNECTICUT AGRICULTURAL COLLEGE, called my attention to a single dwarf individual in a bed of red-flowered plants from commercial seed of a variety of Portulaca grandijora. This plant formed a low compact pin-cushion-like growth in striking contrast to the long straggling habit of the normal plants near it. It is the origin o...

Common purslane (Portulaca oleracea L.) seeds show light-controlled dormancy. Ribosome profiles from dark-incubated seeds consist of 22 to 26% polysomes. Light induces germination and stimulates polysome formation during the 12-hour lag period preceding radicle protrusion. Polysome levels increase to 29, 35, and 41% with exposure to 3, 6, and 9 hours of light, respectively. Although polysomes f...

BACKGROUND This paper is based on ethnobotanical interviews conducted from 1996-2000 in Trinidad and Tobago with thirty male and female respondents. METHODS A non-experimental validation was conducted on the plants used for urinary problems and diabetes mellitus: This is a preliminary step to establish that the plants used are safe or effective, to help direct clinical trials, and to inform C...

Portulaca oleracea Protects H9c2 Cardiomyocytes Against Doxorubicin-Induced Toxicity by Inhibition of Oxidative Stress and Apoptosis

Thestimulatory effect of the extract of Portulaca oleracea (P. olerace) on β-adrenoceptor of tracheal smooth muscle was examined.To examine β-adrenoceptor stimulatory effect, concentration response curve to isoprenaline was obtained in pre-contracted tracheal smooth muscle in the presence of three concentrations of aqueous-ethanolic extract, propranolol, and saline. Values of EC50 (the effectiv...